"Black Rhinoceros." <http://www.geocities.com/RainForest/3785/blackrhinoceros.html>

"Black Rhinoceros." Wildlife Fact File, Card 10. Imp Bv / Imp Inc., 1996.

"Black Rhinoceros." Wildlife Fact File, Card 98. Imp Bv / Imp Inc., 1996.

Curtis, Patricia. Animals You Have Never Even Heard Of. San Francisco: Sierra Club Books, 1997.

Lovett, Sarah. Encyclopedia of Extremely Weird Animals. Santa Fe: John Muir Publications, 1997.

"Manatee." Wildlife Fact File, Card 146. Imp Bv / Imp Inc., 1996.

"Manatee, Lemur." Book of Mammals. Washington D.C.: Special Publications, 1981.

"Ring-Tail Lemur." Wildlife Fact File, Card 187. Imp Bv / Imp Inc., 1996.